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What should I check if my Highlander’s power seats are not working? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I check if my Highlander’s power seats are not working?

What should I check if my Highlander’s power seats are not working?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
669 words

Problem Statement

Learn how to diagnose and repair power seat issues in your 2020-present Toyota Highlander with this comprehensive guide.

Affected Component
power seat system
Estimated Time
2-4 hours

Symptoms

  • •Power Seat Not Moving
  • •No Sound
  • •Partial Functionality
  • •Indicator Lights

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •Fuse puller or needle-nose pliers
  • •Multimeter
  • •Screwdriver set
  • •Wire strippers
  • •Electrical tape
  • •Socket set
  • •Replacement motor (if needed)

Additional Information

Affected Component
power seat system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
7 items

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Back to Generation

If the power seats in your 2020-present Toyota Highlander (Fourth Generation, XU70) are not working, it can be due to several reasons, including electrical issues, faulty switches, or even a blown fuse. Below is a detailed step-by-step guide to diagnose and potentially repair this issue.

Step 1: Visual Inspection

  • Check for Obstructions: Ensure there’s nothing blocking the seat's movement path.
  • Inspect Seat Position: Make sure the seat isn't too far back or in a position that could prevent movement.

Step 2: Check the Power Source

  • Fuses: The power seats are typically on a dedicated fuse. Check the owner’s manual for the fuse box location and the specific fuse for the power seats.
Tools Required:
  • Fuse puller or needle-nose pliers
  • Multimeter (for testing continuity)
Instructions:
  1. Locate the Fuse Box: Usually found under the dashboard on the driver’s side or in the engine compartment.
  2. Identify the Fuse: Refer to the fuse diagram in the owner’s manual to locate the power seat fuse.
  3. Inspect the Fuse: Remove the fuse and visually inspect it. If the metal strip is broken, it’s blown.
  4. Test with Multimeter: If unsure, use a multimeter to check for continuity. Set the multimeter to continuity mode and test both ends of the fuse.
  5. Replace if Blown: If the fuse is defective, replace it with one of the same amperage.

Step 3: Check the Power Seat Switch

  • Switch Malfunction: The switch itself may be faulty.
Tools Required:
  • Screwdriver set
  • Multimeter
Instructions:
  1. Remove the Switch Panel: Using a screwdriver, gently pry up the panel surrounding the seat switch.
  2. Disconnect the Wiring Harness: Carefully disconnect the wiring harness from the switch.
  3. Test the Switch: Use a multimeter to check for continuity across the switch terminals when pressed.
  4. Replace the Switch: If there’s no continuity when the switch is activated, consider replacing the switch.

Step 4: Check Wiring and Connections

  • Inspect Wiring: Damaged wires or loose connections can cause power seat issues.
Tools Required:
  • Wire strippers
  • Electrical tape
  • Multimeter
Instructions:
  1. Examine Visible Wires: Check for frayed or damaged insulation around the wires leading to the seat switch and motor.
  2. Check Connections: Ensure all connectors are secure and free of corrosion.
  3. Test for Voltage: With the multimeter, check for voltage at the connector leading to the motor when the switch is activated.
    • If voltage is present but the seat doesn’t move, the motor may be faulty.
    • If no voltage, trace back to the power source.

Step 5: Test the Power Seat Motor

  • Motor Failure: The motor itself may be defective.
Tools Required:
  • Socket set
  • Multimeter
  • Replacement motor (if needed)
Instructions:
  1. Access the Seat Motor: Remove the seat from the vehicle. This usually involves unbolting the seat from the base (typically requires a socket set).
  2. Disconnect the Motor: Locate the motor and disconnect the wiring harness.
  3. Test the Motor: Apply direct battery voltage to the motor terminals to see if it operates.
  4. Replace if Necessary: If the motor does not operate with direct voltage, replace the motor.
Conclusion

After following these diagnostic steps, you should be able to identify the cause of the power seat malfunction in your Toyota Highlander. If all components (fuse, switch, wiring, and motor) are functioning correctly and the seats still do not work, it may be necessary to consult a professional technician or the dealership for further diagnostics. Always ensure safety procedures are followed when working with electrical components.